Soluble amyloid-beta precursor protein (sAPP) plays an important role in the epidermal melanin-unit as an epidermal growth factor stimulating melanin production in melanocytes and the transfer to keratinocytes. In the end – AD also a daylight deficiency disease?

Source:

Quast, Thomas, Sven Wehner, Gregor Kirfel, Klaus Jaeger, Michele De Luca, and Volker Herzog. „Sapp As a Regulator of Dendrite Motility and Melanin Release in Epidermal Melanocytes and Melanoma Cells.“ The FASEB journal : official publication of the Federation of American Societies for Experimental Biology 17, no. 12 (2003): doi:10.1096/fj.02-1059fje.

Danish scientists challenge the accepted scientific views of how nerves function and of how anesthetics work. Their research suggests that action of nerves is based on sound pulses and that anesthetics inhibit their transmission.

„We’ve collected studies with hundreds of pages of research material that show no evidence other than speculative statistics to support claims that luminous modulation over 100Hz is visible or harmful to human health.

Note: The visibility of flicker and light modulation depends on a number of parameters. While it will not be easy to PROVE the harmful effects of flicker frequencies lower than 1000 Hz, it is easy to check if modulation frequencies above 100 Hz can be seen. As soon as you move the light source and/or the eyes of the watcher, even frequencies above 300 Hz become visible. This is an annoying aspect of most types of automotive rear lights based on LED technology. Many drivers can see the stroboscopic effects of the taillight of a car in front, if the distance is large enough or if the front car moves up and down quickly (e.g. driving over an unevenness). Even letting the view glide from the road scene to instruments and back brings the flicker into awareness for some drivers.

Note: In ophthalmology flickering light is used for example for diagnosis of the capillary damage in the eyes of patients with diabetes. Flickering light causes capillaries in the retina to change caliber which has profound effects on blood circulation as well as metabolic activity.

Note: Again industry tries anything to make sure that they can go on with the conventional practice to manufacture the cheapest, not the best light sources.

BOSTON – Ask anyone who suffers from migraine headaches what they do when they’re having an attack, and you’re likely to hear „go into a dark room.“ And although it’s long been known that light makes migraines worse, the reason why has been unclear.

Now scientists at Beth Israel Deaconess Medical Center (BIDMC) have identified a new visual pathway that underlies sensitivity to light during migraine in both blind individuals and in individuals with normal eyesight. The findings, which appear today in the Advance On-line issue of Nature Neuroscience, help explain the mechanism behind this widespread condition.

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This photonblog.de contains weblinks to topics I am interested in with regard to light, color and health. This blog is a kind of personal logbook and therefore the entries often do not contain pictures or comments. Sometimes, when I have the time and words come easy, a luxurious entry occurs. Personally, I use this blog as a thesaurus via the search functionality.
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